Samsung SGH-E490, Service Manual

Page: 47 / 71

SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting and Circuit Diagrams
3-31
This Document can not be used without Samsung's authorization
C
105
L104
V
C
C
D
_2.
9V
C
111
C
114
R
110
C
131
C
107
UART
_
T
X
V
D
D
_1.8V
18 17
VDD_
IO
VDD_
REG
16
PI
O
_
4
PI
O
_
5
20 21
PI
O
_
6
PI
O
_
7
22
RESET
B
2
UART
_
C
T
S
10 7
UART
_
R
T
S
UART
_
R
X
8 9 5
PCM
_
IN
3
PCM
_
O
U
T
PCM
_
SYNC
4
PI
O
_
0
14 15
PI
O
_
1
PI
O
_
2
24 1
PI
O
_
3
19
TNA
21
11
DNG
31
DNG
32
DNG
PCM
_
CL
K
6
V
R
F_2.
9V
_R
E
G
M
O
D
100
3
OU
T
OU
T
4
F103
2
G
5 G
IN
1
VM
O
D
_
EN
9
VRAM
P
8 6
VT
X
C
129
14
RX4
1V
2
17
V8
PSK
VBAT
T
7 4
VBS1
5
VBS2
10 1 CCV
D2 CCV
3
18
DNG
DNG 20
22
DNG
RF
_
IN_
DCS
1
11
RF
_
IN_
G
S
M
RX1
21 19
RX2 RX3
16
U100
12
ANT
13
DNG
DNG
15
C
140
V
R
F_2.
9V
C
139
C
101
L105
C
132
C
138
C
137
C
102
L106
C
104
R
106
C
135
G
25
G
1
IN
OU
T
3 4
OU
T
C
120
B
9401
F101
C
112
C
123
VBAT
V
C
C
B
_2.
9V
2
G
G
4
RF
IN
1
R
F
S
101
G
3
A
N
T100
1
2
R
101
C
118
V
R
F_2.
9V
_R
E
G
R
105
C
121
C
141
C
126
L102
1
1
V
B
T
_1.
8V
V
B
T
_1.
8V
R1
0
0
U1
0
2
R
109
R
111
O
S
C
100
2
4
3
1
C
100
C
125
R
107
C
117
C1
0
8
R
108
R
103
L108
VBAT
L101
R1
0
4
4
G
C
103
3
VO
UT
R
F
S
100
A 2
3
C
1
G
Q
100
6
CE
2
GN
D
5
GN
D
NC
4
1
VDD
C
115
C
127
C
124
C
130
V
B
T
_1.
8V
L107
C
116
XO
U
T
8
1L ATX 53
2L ATX 43
19
_P
D
N
9
_R
E
S
_S
E
N
1
SD
IO
1 DDV 33
2 DDV 23
3 DDV
12
11
4 DDV
5 DDV
16
6 DDV
17
VI
O
10
VI DX
03
NEX 63
92
EDOMX
RF
IA
N
26
RF
IA
P
23
RF
IDN
RF
IDP
22 25
RF
IE
N
RF
IE
P
24 21
RF
IP
N
RF
IP
P
20
PHOFR
18
PL OFR
15
3
SC
L
K
2
BI
N
6 7
BI
P
4
BQ
N
BQ
P
5
28
GND
73
1 DNG
1 CN 93
2 CN 83
NI P MAR
13
14
TUOP MAR
27
U1
0
1
13
CFA
C
134
C
133
OU
T
OU
T
4
C
122
F100
2
GG
5
IN
1
3
C
119
R
102
C
110
C
106
G
25
G
1
IN
OU
T
3 4
OU
T
V
R
F_2.
9V
_R
E
G
F102
L109
C
113
L110
L100
V
R
F_2.
9V
C
136
C
109
L103
D
EBU
G
_
R
XD
D
EBU
G
_
TXD
PC
M
_
R
XD
PC
M
_
TXD
PC
M
_
FC
L
K
PC
M
_
FSYN
C
VBS1 VBS2
TX_EN
MOD
E
_
S
E
L
RF
_
E
N
AN
T
PC
S_
L
N
A_
IN
_
N
PC
S_
L
N
A_
IN
_
P
D
C
S
_LN
A
_I
N
_N
D
C
S
_LN
A
_I
N
_P
G
S
M
_LN
A
_I
N
_N
G
S
M
_LN
A
_I
N
_P
G
S
M
850_LN
A
_I
N
_N
G
S
M
850_LN
A
_I
N
_P
C
LK
13M
_WM
C
LK
13M
_M
C
AFC
BT_
E
N
VPC
DP
CS
_
P
A
M
_
IN
G
SM
_
PAM
_
IN
S
E
RDA
T
SER
L
E
S
E
RCL
K
D
C
S
_LN
A
_I
N
_N
D
C
S
_LN
A
_I
N
_P
PC
S_
L
N
A_
IN
_
N
PC
S_
L
N
A_
IN
_
P
G
S
M
_LN
A
_I
N
_N
G
S
M
_LN
A
_I
N
_P
G
S
M
850_LN
A
_I
N
_N
G
S
M
850_LN
A
_I
N
_P
RF
_
E
N
XO
EN
A
C
L
K
13M
_TR
VAPC VPC
DP
CS
_
P
A
M
_
IN
G
SM
_
PAM
_
IN
RT
X
IN
RT
X
IP
RT
X
Q
N
RT
X
Q
P